Multiply the amount in PSIG by 6,894.75728, a conversion constant, to convert the amount into pascals. For example, 10,000 PSIG multiplied by 6,894.75728 equals 68,947,572.8 pascals.
Divide that amount by 1,000 to obtain the measurement in kPa. For the example, 68,947,572.8 divided by 1,000 equals 68,947.5728 kPa.
Multiply the amount in kPa by 0.145037738007 to obtain the amount in PSIG. For example, 200 kPa multiplied by 0.145037738007 equals 29.0075476 PSIG.